USN-2675-1: LXC vulnerabilities

Packages

lxc - Linux Containers userspace tools

Details

Roman Fiedler discovered that LXC had a directory traversal flaw when creating
lock files. A local attacker could exploit this flaw to create an arbitrary
file as the root user. (CVE-2015-1331)

Roman Fiedler discovered that LXC incorrectly trusted the container’s proc
filesystem to set up AppArmor profile changes and SELinux domain transitions. A
local attacker could exploit this flaw to run programs inside the container
that are not confined by AppArmor or SELinux. (CVE-2015-1334)

Roman Fiedler discovered that LXC had a directory traversal flaw when creating
lock files. A local attacker could exploit this flaw to create an arbitrary
file as the root user. (CVE-2015-1331)

Roman Fiedler discovered that LXC incorrectly trusted the container’s proc
filesystem to set up AppArmor profile changes and SELinux domain transitions. A
local attacker could exploit this flaw to run programs inside the container
that are not confined by AppArmor or SELinux. (CVE-2015-1334)

Update instructions

In general, a standard system update will make all the necessary changes. You will need to restart your previously running LXC containers in Ubuntu 15.04 due to bug that causes containers to be stopped on during lxc package installation (https://launchpad.net/bugs/1476691).

Learn more about how to get the fixes.

Ubuntu Release	Package Version
15.04 vivid	liblxc1 – 1.1.2-0ubuntu3.1
15.04 vivid	lxc – 1.1.2-0ubuntu3.1
14.10 utopic	liblxc1 – 1.1.0~alpha2-0ubuntu3.3
14.10 utopic	lxc – 1.1.0~alpha2-0ubuntu3.3
14.04 trusty	liblxc1 – 1.0.7-0ubuntu0.2
14.04 trusty	lxc – 1.0.7-0ubuntu0.2

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References